import _thread
import time

def print_time(threadName,delay):
    count = 0
    while count < 5:
        time.sleep(delay)
        count+=1
        print('%s: %s' %(threadName,time.ctime(time.time())))
try:
    _thread.start_new_thread(print_time,('Thread-1',2,))
    _thread.start_new_thread(print_time,('Thread-2',4,))
except Exception as e:
    print(e)
    print('无法启动线程')
while 1:
    pass